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//===- Timer.cpp ----------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lld/Common/Timer.h"
#include "lld/Common/ErrorHandler.h"
#include "llvm/Support/Format.h"
using namespace lld;
using namespace llvm;
ScopedTimer::ScopedTimer(Timer &t) : t(&t) { t.start(); }
void ScopedTimer::stop() {
if (!t)
return;
t->stop();
t = nullptr;
}
ScopedTimer::~ScopedTimer() { stop(); }
Timer::Timer(llvm::StringRef name) : name(name), parent(nullptr) {}
Timer::Timer(llvm::StringRef name, Timer &parent)
: name(name), parent(&parent) {}
void Timer::start() {
if (parent && total.count() == 0)
parent->children.push_back(this);
startTime = std::chrono::high_resolution_clock::now();
}
void Timer::stop() {
total += (std::chrono::high_resolution_clock::now() - startTime);
}
Timer &Timer::root() {
static Timer rootTimer("Total Link Time");
return rootTimer;
}
void Timer::print() {
double totalDuration = static_cast<double>(root().millis());
// We want to print the grand total under all the intermediate phases, so we
// print all children first, then print the total under that.
for (const auto &child : children)
child->print(1, totalDuration);
message(std::string(49, '-'));
root().print(0, root().millis(), false);
}
double Timer::millis() const {
return std::chrono::duration_cast<std::chrono::duration<double, std::milli>>(
total)
.count();
}
void Timer::print(int depth, double totalDuration, bool recurse) const {
double p = 100.0 * millis() / totalDuration;
SmallString<32> str;
llvm::raw_svector_ostream stream(str);
std::string s = std::string(depth * 2, ' ') + name + std::string(":");
stream << format("%-30s%5d ms (%5.1f%%)", s.c_str(), (int)millis(), p);
message(str);
if (recurse) {
for (const auto &child : children)
child->print(depth + 1, totalDuration);
}
}
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